Roscrea is a designated Irish Heritage Town due to the extent of important historical buildings that are preserved in the town. Amongst the most notable buildings of interest are the 13th Century Castle and Damer House on Castle Street. Within the town are the remains of the ancient Romanesque doorway and gable-end of St Cronan's church. The Round Tower and the High cross of the ancient monastery are also located nearby. Also of interest in the town are the remains of the 15th century Franciscan Friary and Monaincha and Sean Ross Abbeys. One of the most famous books produced by the monastery is the Book of Dimma currently on display at Trinity College, Dublin